Monitoring Coverage Calculator
Calculate the percentage of infrastructure and services covered by active monitoring.
About Monitoring Coverage Calculator
Overall coverage = monitored_services / total_services × 100, but treating all services as equally important hides the highest-risk gaps — a service classified as business-critical with no monitoring is a much bigger operational risk than a low-traffic internal tool with no monitoring. This calculator reports both the overall coverage percentage and a separate critical-service coverage figure, and flags any gap in critical coverage as the top-priority finding regardless of overall percentage.
Formula
coverage_percent = (monitored_services / total_services) × 100
- monitored_services
- Services with active monitoring (metrics, alerts, dashboards)
- total_services
- Total services in the platform
Worked example
With the default values below, Monitoring Coverage Calculator returns Overall Monitoring Coverage of 71.8%. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Total Servicesaccepts 1–1,000,000 services
- 85 services
- Monitored Servicesaccepts 0–1,000,000 services
- 61 services
- Critical Servicesaccepts 0–1,000,000 services
- 20 services
- Critical Services Monitoredaccepts 0–1,000,000 services
- 19 services
Results
- Overall Monitoring Coverage
- 71.8%
- Critical Service Coverage
- 95.0%
- Services With No Monitoring
- 24 services
- Critical Services With No Monitoring
- 1 services
- Rating
- Gap in critical service coverage — highest priority to fix
Step by step
- 1Uncovered services= 24 services
- 2Overall coverage: monitored / total × 100= 71.8%
- 3Critical service coverage= 95.0%
- 4Rating= Gap in critical service coverage — highest priority to fix
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
Why treat critical service gaps as automatically top priority?
A single unmonitored critical service can cause a major undetected outage, while many unmonitored low-priority services collectively pose less risk — prioritizing by business impact rather than raw percentage avoids spending effort on low-value instrumentation while critical blind spots persist.
What counts as 'monitored' for this calculator?
This model treats a service as monitored if it has active metrics scraping, at least a basic dashboard, and some alerting — a service with only logs but no metrics/alerts, or only a dashboard nobody's alerting on, arguably shouldn't count as fully covered.
How do I find unmonitored services in practice?
Cross-reference your service catalog/CMDB or Kubernetes namespace list against your Prometheus service-discovery targets or Grafana dashboard list — services present in the former but absent from the latter are your gap list.
Does 100% coverage mean monitoring is 'done'?
No — coverage measures breadth (is there *any* monitoring) not depth or quality (are the right SLIs tracked, are alerts well-tuned). Pair this metric with alert noise score and SLI/SLO tracking for a fuller picture of monitoring maturity.